Rotary motor.



No. 834,651. PATENT-ED OCT. 30, 1906;

s. M. ATKINS.

ROTARY MOTOR. APPLICATION FILED JAN. 20, 1 9os.

O //74 e/7/or Np. 834.651, v

- s. M. ATKINS.

ROTARY MOTOR.

A PPIJUAT ION FILED JAN. 26. 1906;

' PATENTED OCT. 30, 1906.

2 SHEETS-811E312.

.- i fw gt i g M] lsuma'mu,

heads 2 and 3, and this piston PTENT OFFICE.

SAMUEL ATKINS, OF DALLAS, TEXAS. J

ROTARY MOTOR.

Specification of Letters Patent.

Patented Oct. 30, 1906.

Application filed January 26, 1906. Serial No. 298,059.

To all whom it may concern.

Be it known that I, SAMUEL M. ATKINs, a cltizen of the United States, residing at Dallas, Texas, have invented a Rotary Motor, of

which the following is a specification.

My invention relates to rotary motors, and

more particularly to motors provided with rotary pistons; and the object is to provide motors which can be rotated by the expansive power of steam and which are provided with governors which will automatically control the speed of the motors.

Other objects and advantages will be fully explained in the following description, the invention will be more particularly pointed out in the claims.

Reference is had to the accompanying drawings, which'form apart of this application and specification.

Figure 1 is a side elevation of a motor, illustrating my invention. Fig. 2 is a side elevation of the reciprocating vane for one of the rotary pistons, a part 0 the vane being broken away and shown in section to illusvane. Fig. 3 is a cross-section of one of the rotary pistons. taken along the line w a; of Fig. 1, showing the recesses for the reciprocating vanes .and the trate the air-recesses in the edges of the Fig. 4 is a horizontal section steam-ports to these vanes. Fig. 5 is a bottom view of one of the rotary feed-valves.

Fig. 6 is a longitudinal section takensubstantially along the line y y of Fig. 1.

Similar characters of reference are used to indicate the same parts throughout the several views. Y

The motor shown is a doublemotor. The rotary piston 1. is provided with two drivingis fixed on a shaft 4, which may be of any suitable length. The rotary piston is mounted in a cylindrical casing 5 and 6. Packing-rings 6, 7, and 8,

which may be made of Babbitt metal, are embedded in the casing 5 and 6 to prevent friction between the casing and the rotary piston.

Steam is fed to the motor through a pipe connection 9, which may be connected with any suitable supply source of steam. Oscillating valves 10' and 11 regulate the admission of steam to the driving-heads 2 and 3 of the rotary piston. These valves have ports 12, which are adapted to register with steamports 13 and 14 in the casing 5. The oscillating valves are geared so that one will feed steam to piston-head 2 while the other cuts off steam from the rotary piston-head 3. By

and

means of the pipe connection 9 the steam exerts the same pressure in both valves at all times, which pressure is the pressure of the steam in the boiler. The casing or seat 15 for the valves 10 and 11 is or maybe formed integral with part 5 of the casing, and the pipe connection 9 may be formed integral with the casing 15. The rotary piston 1 is cored out at 16 to make the piston lighter. Two reciprocating vanes 17 and 18 are provided, one for each end of the rotary piston. These vanes form the bases to receive the pressure of the steam. The steam expands from these bases against the steam-heads 2 and 3 and drives these heads. The vanes are tapered at their lower or inner ends to conform to the contour of the recesses in'the piston 1. These parts are tapered so that the vanes will always press against the rotary piston or follow the surfaces of the rotary piston, the tapered forms permitting the vanes to extend farther in the rotary piston to take up wear. The vanes are kept pressed against the surfaces of the rotary piston by means of steam which is admitted above the vanes by the port 19 from the steam-inlet connection 9. The vanes are reciprocated by means of the cams 20 on the piston-head. Notice that in Fig. 3 the piston 1 is reversed as compared with Fig. 1. The cam 20 on one end of the piston gradually drives the vane on that end of the piston until the outermost part of the cam passes the vane, The vane then drops behind the driving-head and steam is admitted through a port 12 between the drivinghead and the vane to drive the piston by expansion until the steam is exhausted at the port 21. The driving-heads 2 and 3 are at opposite sides of the piston, so that they raise the vanes 17 and 18 alternately, and the valves 10 and 11 must be so geared that one of the valves will register with one of the ports 13 and 14 just after a driving-head passes one of these ports. The casing for the vanes 17 and 18 is formed integral with the casing 5 and 6 for the rotary piston. The construction of this casing for the vanes is shown in Figs. 1 and 4. The vanes are provided with recesses 22 in the edges thereof for forming cushions of air to relieve the pounding of the vanes against the piston. As the vanes drop down in the recesses in the piston air will accumulate in the recesses 22 and strike against the tapered recesses in the piston. The valves 10 and 11 aregprovidedyvith;

normally held in place by the springs 28.

The valves 10 and 11 are actuated by levercontrolled arms 28, which are pivotally mounted on the ends of the piston 1. The handles 26 hang in the path of the arms 28. Governors 29 are pivotally mounted on the piston-heads by pivot-bolts 30. The governwill actuate the cams 26 ors are pivotally connected to the arms by links 31, which are pivotally connected to the governors and to the arms 28. At ordinary speed the governors will permit the arms 28 to strike the handles or cams 26 and oscillate the valves 10 and 11. If the piston commences to run too fast, the governors will be forced to revolve in larger and larger circles by centrifugal force, and thus draw the arms '28 toward the center of the piston until the arms 28 will miss the cams 26 and fail to oscillate the valves 10 and 11. This will out oif the steam, so that the piston will stop rotating. As the arms 28 are gradually drawn toward the center of the piston these arms less, and thus oscillate the valves less, so that the supply of steam will decrease. As this is done the speed of the piston will decrease and the arms 28 will go back to their normal positions, and the piston will rotate at the normal speed. A spiral spring 31 balances the governor 29 in its normal position. The spring 31 is mounted on a curved arm 32, which has a nut 33 on the end and which moves freely through a guide 34, which is mounted on the piston-head. The spring will be compressed as the governor is forced outward by centrifugal force and the spring will draw the governor back to its normal position when the'eentrifugal force decreases,

the spring striking against the guide 34, but i not passing therethrough.

The cams 20 of the piston are provided with spring-pressed packing-bars 35 to form a steam-tight joint as the piston revolves.

The vanes 17 and 18 are reciprocated by the cams 20 alternately, and steam, which is admitted above the vanes by the port 10, forces the vanes back against the piston, the tapering form of the vanes being flush with the end walls of the recesses in the piston.

Having fully described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. A rotary motor comprising a suitable casing, a rotary piston mounted in said casing and provided with driving-heads and tapered recesses formed therein, a steamsprings for holding said actuated vane having a tapered end co6perating with said tapered recesses and drivin rheads, said casing having a guideway for said vane, an oscillating valve for controlling and feeding steam to said recesses, a valve-seat formed on said casing with a port leading to the interior of said casing, means for operating said valve, and steam connection for said valve-seat and for the guideway of said vane whereby the steam-pressure of the boiler communicates with said valve-seat and said guideway.

2. A rotary motor comprising a suitable casing, a piston rotating in said casing and provided with recesses vanishing over cams, the said cams terminating with driving heads, a reciprocating vane actuated by said cams and engaging said recesses and cooperating with said driving-heads, an oscillating valve for feeding steam to said recesses, a cam for actuating said valve, an arm for actuating said cam pivotally mounted on said piston, a weighted lever fulcrumed on said piston and flexibly connected to said arm, said lever being curved concentrically with a portion of said piston whereby said lever is subject to centrifugal force, and a guide-arm provided with a spring for guiding said lever and drawing the same back to its normal position.

3. A rotary motor having a suitable casing, a piston rotating in said casing and having cams on opposite sides thereof, recesses vanishing over said cams and said cams terminating with driving-heads, reciprocating vanes cooperating with said recesses and said driving-heads, oscillating valves for feeding said recesses alternately, means permitting constant steam-pressure in said valves, a casing formed on said motor-casing for said valves, said valves having stems projecting out of said casing and provided with actuating-cams, and means carried by said piston for operating said cams consisting of a governor-controlled arm pivotally mounted on said piston.

4. A rotary motor having a suitable casing, a piston rotating in said casing and having recesses terminating with driving-heads, reciprocating vanes cooperating with said recesses and driving-heads, oscillating valves for feeding steam to said recesses, a casing for said valves formed integral with said motor-casing, said valves having ports adapted to register with ports in said motor-casing, said valves having stems projecting out of said casing, actuating-cams rigid with said stems, arms for actuating said cams pivotally mounted on said piston, governors mounted on said piston, links pivotally connected to said governors and to said arms, and spiral governors in their normal positions.

5. A rotary motor having a suitable casing, a piston rotating in said casing and having recesses terminating with driving-heads,

reciprocating vanes cooperating with said recesses and with said driving-heads, oscillating valves for feeding steam to said recesses,

actuating-cams engaging said valves, circumscribing springs for holding said cams in their normal positions, arms pivotally mounted on said piston for actuating said cams, governors pivotally mounted on said piston, links pivotally connected to said governors and to said arms, and means for holding said governors in their normal positions consisting of curved rods engaging said governors and carrying nuts on the ends thereof, guards through which said curved arms move, and spiral springs mounted on said curved arms between said guards and said nuts.

and driving-heads,

said vanes having recesses in the edges thereof for forming aircushions against the walls of said recesses, and means for feeding steam to said recesses.

In testimony whereof I set my hand, in the presence of two witnesses, this 5th day of J anuary, 1906.

SAMUEL M. ATKINS. Witnesses:

L. K. STEPHENS, J. R. SooFmLD. 

